The following 25 incredibly healthy foods have the potential to slow biological aging by acting in a number of ways. They provide unique antioxidants and nutrients that bolster our immune system, they defend against free radicals, they maintain a healthy blood-glucose and insulin level and they help to keep inflammation at bay.

Salmon: One of the best sources of omega-3 fatty acids, anti-inflammatories shown to combat aging in cells by preventing special sequences of DNA (called telomeres) from shortening; telomere shortening is linked with the aging process and poorer health.

Soybeans: Nutrient-rich and an excellent source of isoflavones, phytochemicals that may help to reduce the risk of breast and prostate cancer.

Spinach - packed with lutein for eye health and a good source of anti-cancer compounds including vitamins A and C, beta-carotene and flavonoids.

Sweet potatoes: Rich in beta carotene, a phytochemical that not only protects from free-radical damage, but is also thought to guard against cancer by stimulating communication between cells.